Kuril Islands - 13 January 2007, 11:14:17 UTC (Mw = 8.1) The animation shows the ground velocity in the 100-15s period range observed across the western United States by the EarthScope transportable array and generated by the 13 January, 2007 East of Kuril Islands great earthquake. Each circle represents a seismometer and the colors change to reflect variations in the signal amplitude crossing the array. For more information on the earthquake, click here. A plot of the displacement seismograms used in the animation is shown near the bottom of this page.